Improvement in devices for manufacturing metallic cartridge-shells



E. A. WORTHEN. I DEVICE FOR MANUFACTURING METALLIC CARTRIDGE SHELLS.

No. 109,791. Patented Nov. 29, 1870.

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UNITED STATES PATENT ()FFICE.

EDWARD A. WORTHEN, OF SPRINGFIELD, MASSACHUSETTS.

IMPROVEMENT lN DEVICES FOR MANUFACTURING METALLIC CARTRIDGE-SHELLS.

Specification forming part of Letters Patent No. 109,791, dated November29, 1870.

To all whom it may concern:

Be it known that I, EDWARD A. WoRrHEN, of Springfield, in the county ofHampden and State of Massachusetts, have invented a new and usefulImprovementin Devices for Mannfacturin g Metallic Cartridge-Shells; andI do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawingsmaking part of this specification, and to the letters of, referencemarked thereon, in which Figure l is a longitudinal section of ametallic cartridge-shell made according to my improvement. -Fig. 2 isthe same view of the shell after the head has been formed thereon. Fig.3 is asection of the die, shdwing its form, together with that of thedrawing-tool or punch; and Fig. 4 is a side view of the head ing-tool,showing its form.

My invention consists of an improvement in devices for the manufactureof metallic cartridge-shells wherein the punch or drawing-tool used hasa shoulder formed near the end, and that part of the punch between saidshoulder and the end is made somewhat smaller in diameter than the otherpart, so that when the punch is passing through the die, which is of onediameter throughout, in the operation of drawing the shell from a diskof copper, the exterior of the shell takes the form of the interior ofthe die, while the interior of the'shell takes the form of the exteriorof the punch, and the shell, when drawn, has a part, at and near thehead, made thicker for the purpose of giving it additional strength,this thicker part extending up all around from the head as far asdesirable, according to the length of the small part of the punch.

The object of this invention is to strengthen that part of the shellwhich is usually strengthened by the introduction of a re-enforcing-cup,without the separate operations -of introducingand securing a separatere-enforcing cup within the shell.

That others skilled in theart may be able to make and use myimprovement, I will proeeed to describe the same.

In the drawings,D represents the die, which is of an equal diameterthroughout-,as shown at c, and the die in this matter is similar tothose heretofore used, and is secured in place in any desirable manner.I

The punch D is made of a diameter and form ME to correspond with theinterior of the shell, which is or" one diameter when drawn, and saidpunch has a shoulder at e, and that part below the shoulder at F is madesomewhat smaller in diameter than the part E, so that when a copper diskoi. uniform thickness is driven through the 'die by the punch the metalwill be reduced in thickness in that portion which surrounds the partabove the shoulder e.

The form of the shell, after passing through the die or being drawn, isshown in Fig. 1, having an interior shoulder at e, thepart B and alsothe end being thicker than the part A above the shoulder a.

, he heading-tool, shown in Fig. 4, is of the same general form as thosenow in use, having a shoulder at a, and is tapered at b, the part Nbeing made sufiiciently small to pass into the part B of the shell, whenthe outside heading-tool drives the head up, forming the flange.

This improvement in the method of forming the shell obviates thenecessity of the dili'erent operations of making, introducing, andsecuring the common re-cnforcing cups within the shells, and gives thehead of the shell any required or desired strength in the one operationof forming the shell.

Of course the different sizes of shells may have the difi'erent andcorresponding thick nesses given them at the head, according as therelative proportion of the diameter of the parts E and F of thedrawingtool D is maintained or varied at pleasure.

I am aware that cartridge-shells have been re-enforced by theintroduction of metallic cups and other substances, which were securedwithin the head by different and separate operations, and I do not claimthe same, nor any part thereof; but

Having described my invention, what I do

